Sock



FIG. 1 is a perspective view of the front, left and top of a sock showing my new design;

FIG. 2 is a perspective view of the rear, right and top thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is an enlarged fragmentary view thereof.

The broken line showing of the human form in FIGS. 1 and 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a sock, as shown and described. 